Scraper



v Fatentecl El,

rao-srars SCRPER.

.application led 'may 19,

To all whom it 'may concern:

A-lBe it known that I, GLENN `W. Paolina, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a'Scraper, of which the following is a specification.

' rlhis invention relates to improvements in Scrapers used for transporting loose material, and ,more particularly to Scrapers l@ adapted to have reciprocating movement toward and away from the material to be transported.. y

The object of my invention is to provideA an improved construction of a scraper of the 1B class described, and to provide a nove'l method of operating the same. i

"With Scrapers of 'the ordinary well known type having one open end, it is often found ditiicult to manipulate the scraper so as to 2e be loaded easily, as for instance, when a pile 'of loose material is to be attacked, and the, scraper is given reciprocating movement toward and away from the pile. Underthese conditions a scraper of the ordinary type is loaded at the beginning of its forward movement. and the easiest method is usually first to move the scraper over or around the pile, and then dig in on the rear slope, preferably at the bottom,

orheelof the pile if possible. Sometimes,

' however, the material is piled against a wall and in this case the scraper must be made to dig in on top or on the front slope of the pile. ln either instance, the scraper must usually be manually guided into the pile,

and Scrapers are usually'provided with han- .dles for this purpose. Furthermore, the scraper is quitey often loaded in excess o its capacity, and as it moves lforwardly from 40. the pile, the excess material drops o' at the front edge, or toe of the pile and along the way, thereby requiring an excessive amount of power to load the scraper, and resulting in the elongation of the toe of the pile. I p

' ln the present invention, ,l propose to overcome these, and other objectional features of the ordinary scraper devices by prol viding a reciprocable scraper which digs into the forward edge or toe "of the pile into position to be loaded during its `rearward movement. My invention will4 be readily understood by reference to the drawings, l which illustrate one orm of Scraper embodytively.

'lQSL Serial No. 470,771.

ing the features of novelty appended claims.

ln the drawings:

Figure 1 is a top plan view of a scraper constructed in accordance with my'invention.

Figure 2 is a vertical cross-section of the scraper.

In this embodiment of my invention, the scraper is adapted to be movedv by flexible draft ropes, comprising a head rope 10 and a tail rope 11, for moving the scraper forwardly and rearwardly, respectively. The apparatus is set up in the usual manner with the draft ropes trained over fixed guides or sheaves and operatively connected with any suitable power device, such as a hoisting engine.

The scraper comprises a body portion 12, having side walls 13, 13 connected by front and rear cross-members 14:, and 15, respec- The drawings illustrate a preferred form of scraper having no bottom, but a bottom may be found desirable under some circumstances, and may be provided without departing from the scope of my invention. The side walls 13,13 diverge slight-ly toward the front end of the scraper, and the bottom margins of said walls are inclined or turned claimed in the inwardly to form substantially horizontal cutting edges 16, 16, as shown.

The rear end of the scraper comprises two upright wall portions 17, 17 pivotally-connected to the rear end of the side walls. as indicated at 18, 18. The arrangement is such that the pivoted wall portions normally form a closure for the rear end of the scraper, but are mounted to swing laterally and rearwardly into a position substantially parallel with each other, or into substantial alignment with thel adjacent sidewalls of the scraper.' The forward movement, of the wall portions is limited by stops 19, 19, carried on forwardly projecting arms 20, 20, attached to the wall portions 17, said stops being adapted to engage the cross-member 15. The bottom margins *of the rear wall portions 17, 17, are preferably inclined or turned inwardly to form cutting edges 21, 21,'similar to the cutting edges 16, 16 of the side walls.

Means co-acting with the draft ropes are provided for actuating the rear wall portions, so as to openthe rear end of the scraper llUO embodiment illustrated, the head rope isl provided with a pair of Hexible terminals 23, 23. Each of said terminals is connected at its rear end to a clamp 24, or its equiva lent, mounted on the cross-member 15. FromA thence it is trained rearwardly about a sheave or its equivalent, mounted on a supporting member 2G extending inwardlyfrom the end wall portion 17. From said sheave, the terminal 23 is trained forwardly l through a guide 27, adjacent the front end of the side wall 13, and from thence it extends to the head rope 10, and is connected thereto by suitable meanssuch as a clamp 28. A stop 29 is attached to the terminal 23 intermediate the guide 27 and clamp 28, and adapted to engage the guide 27, to limit the lateral swing of each wall portion 17 in a position substantially parallel with the opposite wall 17 as shown in dotted lines in Figure 1.

The tail rope 1l extends between the ends of the wall portions 17, 17, and is provided with a pair of terminals 30, 30, connected to arms 31, 31 extending inwardly from said wall portions as shown. It is'obvious that the inwardly extending arms 31, 3 1 may be made integral with the supporting members 26 26 if desired.

lt will now be clear that my improved scraper above described, gathers its load at vthe toe of the pile while being moved rearwardly. The rear wall portions 17, 17 are opened laterally bythe tail rope 11 into substantial parallel relation with each other, so as to offer a'minimum resistance as ,the scraper cuts into the material. When the scraper has advanced sufficiently togather its load, the pull on the tail' rope 11 is discontinued, land tension is placed on the head rope 10. As the terminalsl of the head rope are connected to the level' arms 26, 26 on the rear wall portions 17, 17, a pull on the head. rope tends to pivot the wall portions inwardly, to close the rear end of the 'scraper i and move the material enclosed therein forwardly. Under some conditions, the rear wall portions may not become fully closed, but the material will be wedged between the wall portions sufficiently to move the load Withoutlosing an appreciable amount thereof. 1

In the preferred construction illustrated it will be seen that the head rope terminals 23, 23 are trained about pulleys 25, 25 to provide an .increased leverage on the rear wall portions. It will further be observed Aone of said end portions.v

rasate@ that the. rear end of said head rope terminals are connected to the body of the scraper,

ance againstforward movement when ma-l terial is in the scraper. By reason of this arrangement, a larger proportion of the pulling force' is exerted toward closing the rear wall portions than would be the case Yif the scraperbody offered less resistance against forward movement.

I claim as my'lnvention:

l. A scraper having sidewalls, two end..

wall portions adapted normally to form a closure for one end of said scraper, and each pivot-ally mounted to swing about a vertical axis into position substantially parallel with the longitudinal axis'of thescraper, draft means for reciprocably, moving said scraper; and means co-acting with said draft means for actuating said pivoted wall portions.

2. A scraper having side walls, two end portions adapted normally to form a closure for one end of said scraper, draft means for reciprocably `operating said scraper, and means operated by the tension on said draft means for moving said end portions'into and out 'of substantiall parallelism with each' other.

3. A scraper having side walls, two end wall portions each pivotally mounted'to swing laterally, draft means for reciprocably moving said scraper, and means co-aeting with said draft means for actuating said pivoted wall portions.

4. A scraper havingv sidewalls, twov end wall portions each pivotally mounted to swing laterally into substantial alignment with its adjacentside wall, draft .means for reciprocably moving said scraper, and means c'o-acting with said draft means for actuating said pivoted wall portions.

5. A scraper having connected side walls, two end portions each pivotally connected with one of said walls to swingV laterally, and two draft devices each having operative connection with said end portions and -tending to move them in opposite directions.

6. A scraper having connected side walls, two end portions each p'ivotally connected with one of saidv wallsto swing laterally,

and two draft devices each-having oper` ative connection with saidend portions and tending to move them 1n opposite directions,

one of said draft devicesv having a pa-ir'of terminals, each connected'. to -the scraperbody and engaging a.4 pulley mounted on 7. A scraper having connected side walls,

two end portions each pivot-ally connected.

connection with said end portions and tending to move them in opposite directions,

one of said draft devices 'having a pair of terminals, each connected to the scraper body and engaging a pulley mounted on one of said end portions, the other of said draft devices having a pair of terminals each connected directly to one of said end portions.

48. A scraper having connected side walls, two end portions each pivotally connected with one of said walls to swing laterally, two dra-ft devices each having operative connection with said end portions and tending to move them in opposite directions, one of said draft devices having a pair of terminals, each connected to the scraper body and engaging a pulley mounted on one of said end portions, and guide means for said terminals adjacent the front end of said scraper.

9. A scraper having connected side walls, two closure members each pivotally connected with one of said walls toswing laterally, means extending inwardy from each of said members intermediate its ends, and two flexible draft devices for reciprocably moving saidl scraper operatively connected 'with` said inwardly extending means and tending to move their respective closure l members in opposite directions.

' 10. A scraper having connected side walls, two closure members each pivotally connected with one of said walls to swing lat erally, means extending inwardly from each of said members intermediate its ends, and

two flexible draft devices for receiprocably moving said scraper one of said draft. devices having flexible means connectedl with the side walls and movably engaging said inwardly extending means on said closure members. i

11. A scraper having connected side walls, two closure members each pivotally connected with one of said walls to swing laterally, means extending inwardly from each of said members intermediate its ends, Vand two iiexible draft devices for reciprocably moving said scraper one of said draftdevices having iexible means connected with the side walls and movablyengaging said inwardly extending meanson said closure members, the other of said draft devices being directly connected to said inwardly extending means.

Signed at Chicago, Illinois, this thirteenth day of May1921.

GLENN w. PACKER. 

